When Seth is watching a video of a magician, he says that his name is Shandu. This is a call back to the old school episode titled "The Magicians Assistant" where the saying "Shandu can do" was the magic phrase
Hanna makes a reference to Ghostface, the villain in the Scream franchise. The protagonist of the Scream films is played by Neve Campbell, who guest starred in the Season 3 finale The Tale of the Dangerous Soup.
Goof: When Luke and Hannah are trying to find a way into Conners house, Hanna sneaks in through and upstairs window. When she opens the downstairs door to let Luke in you can see a redhead woman wearing a vest and holding a purse walk by. When the scene cuts back and Hannah says "I found a way in" you can see the same woman pass by again.